Home / 1,690.12-2,332.35-933.91

Finding the Fourth Proportional to 1,690.12, 2,332.35 and 933.91

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Solution

The fourth proportional to 1,690.12, 2,332.35 and 933.91 is: 1,288.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,690.12 : 2,332.35 = 933.91 : x
  2. Step 2: Convert to fraction form
    1,690.12/2,332.35 = 933.91/x
  3. Step 3: Cross multiply
    1,690.12x = 2,332.35 × 933.91
  4. Step 4: Simplify right side
    1,690.12x = 2,178,204.99
  5. Step 5: Solve for x
    x = 2,178,204.99/1,690.12
  6. Step 6: Final answer
    x = 1,288.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.